Concept explainers
a.
To determine:
The molar mass of calcium sulfate.
Introduction:
Molar mass is defined as the number, which is equal to the sum of the atomic masses of the atoms in a molecule. The molecular mass gives the mass of molecule relative to that of the
b.
To determine:
The molar mass of carbohydrate glucose.
Introduction:
Molar mass is defined as the number, which is equal to the sum of the atomic masses of the atoms in a molecule. The molecular mass gives the mass of molecule relative to that of the
c.
To determine:
The molar mass of hydrogen peroxide.
Introduction:
Molar mass is defined as the number, which is equal to the sum of the atomic masses of the atoms in a molecule. The molecular mass gives the mass of molecule relative to that of the
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General, Organic, and Biological Chemistry (3rd Edition)
- Two molecules used in the polymer industry are azodicarbonamide and methyl cyanoacrylate. Their structures are Azodicarbonamide Methyl cyanoracy late Azodicarbonamide is used in forming polystyrene. When added to the molten plastic, it decomposes to nitrogen, carbon monoxide, and ammonia gases, which are captured as bubbles in the molten polymer. Methyl cyanoacrylate is the main ingredient in super glue. As the glue sets, methyl cyanoacrylate polymerizes across the carbon-carbon double bond. (See Chapter 21.) a. Complete the Lewis structures showing all lone pairs of electrons. b. Which hybrid orbitals are used by the carbon atoms in each molecule and the nitrogen atom in azodicarbonamide? c. How many bonds are present in each molecule? d. Give approximate values for the bond angles marked a through h in the previous structures.arrow_forwardDetermine the molar ratio of O2 / C2H6O C2H6O (l) + O2(g) -----------> CO2(g) + H2O(g) A.) 3/1 B.) 1/2 C.) 2/1 D.) 1/1arrow_forwardWhy are these molecules considered the same approximate size if one has 5 atoms, CH3Cl, and the other has 8 atoms, CH3CH3?arrow_forward
- How many equivalent carbons are in C2H3Cl3 ? A) 2 B) 1 C) 0 D) 3arrow_forwardExplain Molecular Models and the Size of Molecules?arrow_forwardThe dimeric hexamethyl dialuminum molecule Al2(CH3)6 has how many hydrogen atoms? A)3 b)6 c)18 d)36 The dimeric hexamethyl dialuminum molecule Al2(CH3)6 has how many total atoms? A)8 b) 24 c)26 d)52arrow_forward
- The compounds Br2 and ICl have almost identical molecular weights, yet ICl boils at 97°C and Br2 boils at 59°C. The best explanation for the difference is that ICl __. a) is an ionic compound and Br2 is covalent b) is a nonpolar molecule and Br2 is polar c) has a longer bond than that in Br2 d) has a measurable dipole moment and Br2 does not e) has a stronger bond than that in Br2arrow_forwardWhich pairs are correctly arranged in order of increasing size? I Co < Co2+ II Cl < Cl-III Mg2+ < Mg IV P3- < P Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a I and II b I and III c I and IV d II and III e II and IV f III and IVarrow_forwardAtom A has 4 valence electrons. Atom Z has 6 valence electrons. For the AZ3-2 ion, answer the following questions about its Lewis dot structure (drawn according to Chm 130 guidelines). a. How many valence electrons are in the structure? b. How many single bonds are in the structure? c. How many double bonds are in the structure? d. How many triple bonds are in the structure? e. How many lone pairs are on the central atom in the structure? f. What is the shape of the structure? g. What are the bond angles of this ion?arrow_forward
- 37. When a Group IIA element X, combines with a Group IIIA element, Y to form a covalent bond, the generic formula for the new compound is A. X Y2 B. X3 Y2 C. X2 Y D. They do not form a covalent bond. E. X2 Y3arrow_forward3. A. Draw and label an energy diagram for a slow endothermic reaction B. A weather balloon contains 222 L of helium gas at 20.8 °C and 754 mm Hg. What is the volume in liters of the balloon when it rises to an altitude where the pressure is 552 mm Hg and the temperature is -40.0 °C C. Draw two different Lewis structures for C2H4O2, connecting the atoms differently in your two structures. Label the shape of each carbon atom in both structures.arrow_forwardButanol has the chemical formula C4H9OH. d) In the molecule of butanol, there are C-C bonds, C-H bonds, a C-O bond and a O-H bond. Order these bonds from most to least polar e) On average, would you expect C-C to have longer or shorter bonds than C-H Briefly explain your answer. f) From the reaction 2.57 L of carbon dioxide was produced and captured. Calculate the number of molecules of carbon dioxide if the temperature was 25.0 C and the pressure 1. 01 × 105 Pa. g) The empirical and molecular formula for butanol is the same. Briefly explain why.arrow_forward
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